1. Izindinganiso zokusebenzisa
Qinisekisa inguqulo yakamuva ye-ASTM A333/A 333M (ukwakheka kwamakhemikhali kwenguqulo ngemuva kuka-2016 kuyalungiswa, futhi kunezelwa imikhawulo emisha yezinto ezifana ne-Cr, Ni, kanye ne-Mo).
2. Ukulawulwa kokwakheka kwamakhemikhali
Imikhawulo yezinto ezibalulekile:
C≤0.30% (ikhabhoni ephansi iqinisekisa ukuqina), Mn 0.29-1.06% (ilungiswe ngokuqukethwe kwe-C), P≤0.025%, S≤0.025% (ikhawulela ngokuqinile izinto eziyingozi).
Inguqulo ka-2016 yengeza imikhawulo ephezulu ye-Ni, Cr, Mo, njll. (njenge-Ni≤0.40%), futhi kuyadingeka ukuhlola ukuthi incwadi yewaranti imakwe nge-carbon equivalent (CET).
Ukuthuthukiswa kwezinto: Inguqulo entsha ye-A333GR6 ithuthukisiwe kusukela ensimbini ye-C-Mn kuya ensimbini ephansi ye-alloy, ngokusebenza okungcono.
1. Izakhiwo zemishini
Amandla okunamathela ≥415MPa, amandla okukhiqiza ≥240MPa, isilinganiso samandla okukhiqiza aphansi (esibonisa ikhono lokuguquguquka kwepulasitiki)
Ukuhlolwa komthelela wokushisa okuphansi:
Izinga lokushisa lokuhlola liyahlukahluka ngobukhulu bodonga (njengo--45℃ ~ -52℃), futhi izidingo zenkontileka kumele zichazwe ngokucacile.
Inani lamandla omthelela kumele lihlangabezane nezindinganiso, ngokuvamile ezidinga ≥20J (bheka i-ASTM A333 ukuthola imininingwane).
2. Isakhiwo se-Metallographic
Isimo sokuphakelwa kufanele sibe yi-ferrite + pearlite efanayo, enobukhulu bezinhlamvu obungu-7 ~ 9 (okusanhlamvu okuqinile kunganciphisa isilinganiso samandla okukhiqiza).
Kungcono ukhethe amapayipi ensimbi acinyiwe + aqinisiwe (isakhiwo siqinisiwe nge-troostite, kanti ukuqina kokushisa okuphansi kungcono).
Inqubo yokwelapha ukushisa
Amarekhodi okwelashwa kokushisa kumele ahlinzekwe: ukushisa ≥815℃→ukucima amanzi→ukushisa ukuqinisekisa ukufana kwesakhiwo.
Gwema isimo sokuqala esingalashwanga noma esingaphathwanga kahle (isakhiwo esimahhadla siholela ekuqhekekeni kwezinga lokushisa eliphansi).
Isimo sokulethwa
Ngokuvamile kulethwa esimweni esijwayelekile + esithambile noma esiqediwe + esithambile, okudingeka sichazwe kwinkontileka.
1. Ubukhulu bodonga kanye nokuhambisana kokushisa komthelela
Isibonelo: uma ubukhulu bodonga bungu-7.62mm, izinga lokushisa lokuhlolwa komthelela kudingeka lifinyelele ku--52℃ (liphansi kune--45℃ ejwayelekile).
Imininingwane yendawo evamile: 8-1240mm×1-200mm (SCH5S-XXS), isidingo sangempela sidinga ukuhlolwa.
2. Izinto ezihlukile ezifanayo
A333GR6≈X42N/L290N/API 5L B PSL2 (ipayipi yomugqa), kodwa kuyadingeka ukuqinisekisa ukuthi ukusebenza kwezinga lokushisa eliphansi kuyahlangatshezwana yini.
Amadokhumenti okumele uwahlole
Isitifiketi sezinto ezibonakalayo (i-MTC), umbiko wokwelashwa kokushisa, umbiko wokuhlolwa komthelela wokushisa okuphansi, umbiko wokuhlola ongonakalisi (i-UT/RT).
Ngemva kwenguqulo ka-2016, idatha yokuhlola yezinto ezisanda kufakwa ze-alloy (Ni, Cr, njll.) kumele ifakwe.
Ukuhlolwa kabusha komuntu wesithathu
Kunconywa ukuhlola kabusha izinto ezibalulekile (njengokuhlolwa komthelela, ukwakheka kwamakhemikhali) ngokuthatha amasampula, ikakhulukazi ekusetshenzisweni okuyingozi kakhulu (njengemipayipi ye-LNG).
Ibanga lokushisa
Izinga lokushisa lokusebenza eliklanywe kahle elingu-≥-45℃, izimo zokushisa eziphansi kakhulu (ezifana no--195℃) zidinga ukuhlola ukuthi izinga eliphezulu liyadingeka yini (njenge-A333GR3/GR8).
Isicelo semboni
Amakhemikhali kaphethroli (i-ethylene, i-LNG), imishini yokuqandisa, amapayipi e-cryogenic, njll., kudingeka acabangele ukuvikelwa okwengeziwe (njengokumboza) ngokuya ngokugqwala kwe-medium
Iziqu kanye nokusebenza
Khetha ngokukhethekile abakhiqizi abaneziqu zokukhiqiza ze-ASTM A333, futhi udinge izimo zokuphakelwa kwamaphrojekthi afanayo.
Qaphela ukuziphatha kwabadayisi "be-OEM" bese uqinisekisa amadokhumenti ewaranti yokuqala yasefektri.
Intengo nesikhathi sokulethwa
Inguqulo ene-alloy ephansi (ngaphambi kuka-2016) ingaba nentengo ephansi, kodwa umehluko wokusebenza mkhulu, futhi ukusebenza kwezindleko eziphelele kuyadingeka.
Imininingwane ekhethekile (njengemipayipi enobubanzi obukhulu enodonga olujiyile) ingadinga ukwenziwa ngokwezifiso, yandise umjikelezo wokulethwa.
Ingozi yokudideka: Ungadidanisi i-A333GR6 ne-A335GR6 (insimbi ye-chromium-molybdenum yokushisa okuphezulu).
Isitokwe esijwayelekile esidala: Qinisekisa ukuthi ipayipi lensimbi liyakhiqizwa yini ngemva kwenguqulo ka-2016 ukuze kugwenywe ukuthi izakhi ze-alloy zemikhiqizo ejwayelekile endala azihlangabezani nezindinganiso.
Inqubo yokushisela: Ukushisela amapayipi ensimbi okushisa okuphansi kudinga izinto zokushisela ezifanayo (njenge-ENiCrMo-3), futhi umhlinzeki kufanele anikeze isiqondiso sokushisela.
Ngamaphuzu angenhla, umthengi angahlola ngokuhlelekile ukuhambisana, ukuhambisana kokusebenza kanye nokuthembeka komhlinzeki wepayipi le-alloy le-A333GR6 ukuqinisekisa ukuphepha kanye nomnotho wephrojekthi.
Isikhathi sokuthunyelwe: Juni-12-2025
